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What data on 20 million traffic stops can tell us about ‘driving while black’

Analysis by
Contributor, Monkey Cage
July 17, 2018 at 5:30 a.m. EDT
The car of Philando Castile is seen surrounded by police vehicles in an evidence photo taken after he was fatally shot by St. Anthony Police Department officer Jeronimo Yanez during a traffic stop in July 2016. Picture released June 20, 2017. Minnesota Bureau of Criminal Apprehension/Handout via REUTERS.

In their book “Suspect Citizens,” the political scientists Frank Baumgartner, Derek Epp and Kelsey Shoub dive deep into an extraordinary database on how police officers treat ordinary citizens. They kindly answered some questions via email. A lightly edited transcript is below.

The focus on this book is traffic stops. What is the value of studying them?